Mass Profiles of the Typical Relaxed Galaxy Clusters A2199 and A496

We present maps and radial profiles of the gas temperature in the nearbygalaxy clusters A2199 and A496, which have the most accurate ASCA spectral datafor all hot clusters. These clusters are relaxed and can provide reliable X-raymass measurements under the assumption of hydrostatic equilibrium. The clusteraverage temperatures corrected for the presence of cooling flows are 4.8+-0.2keV and 4.7+-0.2 keV (90% errors), respectively. Outside the central coolingflow regions, the radial temperature profiles are similar to those of themajority of nearby relaxed clusters. They are accurately described bypolytropic models with gamma=1.17+-0.07 for A2199 and gamma=1.24+-0.09 forA496. We use these polytropic models to derive accurate total mass profiles.Within r=0.5/h Mpc, which corresponds to a radius of overdensity 1000, thetotal mass values are 1.45+-0.15 10^14 /h Msun and 1.55+-0.15 10^14 /h Msun.These values are 10% lower than those obtained assuming constant temperature.The values inside a gas core radius (0.07-0.13/h Mpc) are a factor of >1.5higher than the isothermal values. The gas mass fraction increases with radius(by a factor of 3 between the X-ray core radius and r_1000) and at r_1000reaches values of 0.057+-0.005 and 0.056+-0.006 h^-3/2 for the two clusters,respectively. Our mass profiles within r_1000 are remarkably well approximatedby the NFW "universal" profile. Since A2199 and A496 are typical relaxedclusters, the above findings should be relevant for most such systems. Inparticular, the similarity of the temperature profiles in nearby clustersappears to reflect the underlying "universal" dark matter profile. The upwardrevision of mass at small radii will resolve most of the discrepancy betweenthe X-ray and strong lensing mass estimates. (Abridged)Comment: Latex, 9 pages, 6 figures, uses emulateapj.sty. Submitted to Ap